SYNOPSIS

DESCRIPTION

The vlserver command initializes the Volume Location (VL) Server, which
runs on every database server machine. In the conventional
configuration, its binary file is located in the /usr/lib/openafs
directory on a file server machine.
The vlserver command is not normally issued at the command shell prompt
but rather placed into a file server machine’s /etc/openafs/BosConfig
file with the boscreate command. If it is ever issued at the command
shell prompt, the issuer must be logged onto a database server machine
as the local superuser "root".
As it initializes, the VL Server process creates the two files that
constitute the Volume Location Database (VLDB), vldb.DB0 and
vldb.DBSYS1, in the /var/lib/openafs/db directory if they do not
already exist. Use the commands in the vos suite to administer the
database.
The VL Server maintains the record of volume locations in the Volume
Location Database (VLDB). When the Cache Manager fills a file request
from an application program, it first contacts the VL Server to learn
which file server machine currently houses the volume that contains the
file. The Cache Manager then requests the file from the File Server
process running on that file server machine.
The VL Server records a trace of its activity in the
/var/log/openafs/VLLog file. Use the bosgetlog command to display the
contents of the file. By default, it records on a minimal number of
messages. For instructions on increasing the amount of logging, see
VLLog(5).
By default, the VL Server runs nine lightweight processes (LWPs). To
change the number, use the -p argument.
This command does not use the syntax conventions of the AFS command
suites. Provide the command name and all option names in full.

OPTIONS

-p <lwpprocesses>
Sets the number of server lightweight processes (LWPs) to run.
Provide an integer between 4 and 16. The default is 9.
-d <debuglevel>
Sets the detail level for the debugging trace written to the
/var/log/openafs/VLLog file. Provide one of the following values,
each of which produces an increasingly detailed trace: 0, 1, 5, 25,
and 125.
-jumbo
Allows the server to send and receive jumbograms. A jumbogram is a
large-size packet composed of 2 to 4 normal Rx data packets that
share the same header. The VL Server does not use jumbograms by
default, as some routers are not capable of properly breaking the
jumbogram into smaller packets and reassembling them.
-nojumbo
Deprecated; Jumbograms are disabled by default.
-enable_peer_stats
Activates the collection of Rx statistics and allocates memory for
their storage. For each connection with a specific UDP port on
another machine, a separate record is kept for each type of RPC
(FetchFile, GetStatus, and so on) sent or received. To display or
otherwise access the records, use the Rx Monitoring API.
-enable_process_stats
Activates the collection of Rx statistics and allocates memory for
their storage. A separate record is kept for each type of RPC
(FetchFile, GetStatus, and so on) sent or received, aggregated over
all connections to other machines. To display or otherwise access
the records, use the Rx Monitoring API.
-allow-dotted-principals
By default, the RXKAD security layer will disallow access by
Kerberos principals with a dot in the first component of their
name. This is to avoid the confusion where principals user/admin
and user.admin are both mapped to the user.admin PTS entry. Sites
whose Kerberos realms don’t have these collisions between principal
names may disabled this check by starting the server with this
option.
-help
Prints the online help for this command. All other valid options
are ignored.

PRIVILEGEREQUIRED

The issuer must be logged in as the superuser "root" on a file server
machine to issue the command at a command shell prompt. It is
conventional instead to create and start the process by issuing the boscreate command.

SEEALSO

COPYRIGHT

IBM Corporation 2000. <http://www.ibm.com/> All Rights Reserved.
This documentation is covered by the IBM Public License Version 1.0.
It was converted from HTML to POD by software written by Chas Williams
and Russ Allbery, based on work by Alf Wachsmann and Elizabeth Cassell.